Serial port menu grayed out

Hello,

I am unable to select a serial port in the Arduino software therefore I cannot upload any programs.
If I connect the Arduino to the PC, it just detects my Arduino as USB2.0-serial (Hardwer ID: USB\VID_1A86&PID_7523&REV_0254)
I'm runing Windows 7 prof x64.
I'm tryed reinstall the Arduino software, and I also tryed install earlyer software too.

Does anyone have any suggestions?

Thanks!

PS.: Sorry of my English.